Dumping-wagon.



H. MAYER & e. SCHLATTER.

DUMPING WAGON.

APPLICATION \FILED OCT-18. 1916.

1 ,25 1,399. Patented Dec. 25, 191.7

3 SHEETS-SHEET 1-- H. MAYER -& G. SCHLATTER. DUMPING WAGON- APPLICATION FILED OCT. l8 1916.

1,251,399. Patented Dec. 25,1917

' ll grz.

3 SHEETS-SHEET 2.

H. MAYER & G. SCHLATTER.

DUMPING WAGON.

APPLICATION FILED OCT. 18. 1916.

U 3 m m w 0 H %w F a e .7 M I A. a Ms UNITED STATES PATENT OFFICE.

HEINRICH MAYER, 0F ARBON, AND GUSTAV SCHLATTER, OF STEINACH,,SWITZEB- LAND, ASSIGNORS TO THE FIRM OF ADOLPH SAURER, OF ARIBON, SWITZERLAND.

/ DUMPING-WAGON.

I Specification of Letters Patent.

Application flied October 18, 1916. Serial No. 126,458.

and residents of Arbon and Steinach, Switzerland, respectively, have invented a new and useful Dumping-Wagon, of which the following is a specification.

This invention relates toa tip-wagon in which the dumping box body is adapted to pivot about a shaft supported on the underframe and the mechanism for tipping the box is actuated by a liquid under pressure.

Owing to existing conditions, the space available in such wagons is exceedingly limited. The width of the Wagon is restricted. Its length cannot exceed certain limits because its wheel base should be short so as to enable it to take sharp curves without difficulty even in narrow streets etc. Finally, it should be low for the obvious reason that it is not convenient to raise its load to a considerable level from the ground. This point is particularly important in cars for the removal of refuse. As, obviously, the greater part of the capacity must be reserved for the load, the space left for the actuating mechanism is small and must be utilized to the best advantage. With this object in view, the pins about which pivots the dumping box body are arranged coaxially with the dumping shaft to which said box is secured, the brackets supporting said pins extending through recesses of the dumping-shaft. The webs formed on said shaft in the vicinity of said recesses to make up for the weakening of the shaft are so constructed that they also form the dumping-levers and so arranged in relation to the pins on which pivots the dumping-shaft that two dumping-levers are provided for each pin, one on each side of it, and exactly or approximately equi-distant from the longitudinal center of the pin. Further, the mechanism for tipping the box body is so constructed that it maintains the tipped box in position as long as desired and thebox is, on its return to normal position, retarded without the assistance of any auxiliary means for which extra space would berequired. Finally, the box-itself is. so braced that it requires noseparate frame but is self-supporting.

Reference is to be had to theaccompanying drawings in which a constructional example of this invention is illustrated.

Figure 1 is a sectional elevation showing the pump for the actuating liquid and the parts operating it, it being assumed that the pump is operated from a motor serving to propel the wagon; Fig. 2 is a longitudinal section of one of the dumping cylinders with other parts in elevation, Fig. 3 is a section of a valve inserted in the liquid pipe connecting the pump to the dumping cylinder, drawn to a larger scale, Fig. 4 is a front Patented Dec. 25,1917;

end view, Fig. 5 a vertical section and Fig.

.6 a plan View shaft. p

The pump 1 is, in the case of a motor propelled wagon, arranged near the I drivers seat so that it can be controlled by means of a pedal lever 2.

In the present instance, power is transmitted to the pump from a shaft 3 of the change-speed gear with which shaft 4 of the pump may be connected by means of a clutch 5, 6. In this manner, motion is imparted to the plunger 9 of pump 1. through the medium of crank 7 and connecting rod 8. I A pipell connects the suction chamber 10 of pump 1 with a storage tank 12 for the liquid. The pressure chamber 13 of the pump is connected to the pressure cylinder or cylinders 15-by a pipe14. A return pipe 16 connects the cylinder or cylinders 15 with tank 12. s

Whenit is desired to operate the pump, the driver by means of pedal lever 2 rocks a shaft 17 on which is fixed a double-armed lever 18, 19. Another further lever 20 on shaft 17 controls the spindle 21 of a valve 22 of pump 1. When the pedal lever 2 is in the position illustrated, the liquid from the pump passes from pressure chamber 13 through a ort 23 past the seat 24 of valve 22 and a f nrther port 25 onto the suction chamber 10 and returns to tank 12 through of a portion of the dumping pipe 11. As soon as the driver depresses the pedal 2, a spring 26 is compressed which is held on a rod linked to lever 18. This causes an angular lever 27, 28 to connect clutch 5, 6, so that pump 1 is operated. Simultaneously,

a pull back spring 29 engaging lever 19 is 7 will force liquid under pressure into cylinder 15 through pipe 14. On its way, the liquid flows through a nozzle 30 and gets to the seat, 31 of a valve 32, see Fig. 3. This valve is guided in a tubular casing 33 which is closed at the end opposite seat 31 by a plug 34 having perforations 35. A spring 36 is inserted between plug 34 and valve 32 which springtends to keep the valve seated. The valve has a bore 37 which allows liquid to pass independently of the position of the valve.

The valve casing 33 has lateral passages 38 above the seat of Valve 32 which, when the valve is lifted, permit liquid under pressure to flow through the annular space between valve casing 33 and a hollow boss 39 which may be cast integral with cylinder or cylinders 15.

The piston 40 of cylinder or cylinders 15 has a rod 41 linked to the cross-head 42 of which are two connecting rods 44, only one of which is shown in Fig. 2. These rods 44 engage the pin 45 of a pair of dumpinglevers 45 formed on the hollow dumpingshaft 46. This shaft is supported on brackets 47 secured to the frame 48 of the wagon and has lateral ledges 49 to which the dumpingbody 50 is secured. The construction of the dumping-shaft, dumping-levers etc.-, will be described in detail below.

When pump 1 forces liquid into cylinder or cylinders 15 through pipe 14, the liquid will flow through nozzle 30 and bores 37 and 35 and push piston 40 to the left in Fig. 2, thereby rocking shaft 46 and dumping-box 50. When pressure increases in pipe 14, valve 32 will be lifted from its seat so that now li uid is also forced through passages 38. hen the tipped box is in its highest position, say at an angle of 60, piston 40 opens a port 51 in the wall of cylinder 15, as shown in dotted lines in Fig. 2. Through this port and pipe 16, the liquid flows back into tank 12. The constructional proportlons of the apparatus are such that the pump 1 makes up for the loss of liquid through port 51 so that piston 15 remains stationary for the present and maintains body 50 in its tipped position. When the drlver releases pedal 2, spring 29 causes valve 22 to open whereupon clutch 5, 6 is disconnected and bell crank lever 18, 19 returns to the position illustrated in Fig. 2. As soon as valve 22 1s open, no more liquid is forced into cylinder 15 so that now the tipped box begins to descend until piston 40 again reaches its initial position. Port 51 is closed as soon as piston 40 has gone beyond 1t and the liquid escapes fron'i the cylinder 15 through the bore 37 of valve 32which 1S closed by its spring 36 as soon as the pressure tendlng to lift it ceases,into pipe 14, to the pressure chamber of pump 1 and on to tank 12 through ports 23, 25 and pipe 11.

Valve 32 being closed, the liquid must flow back through perforations 35 of plug 34 and the bore 37 of valve 32. Owing to the small area of these passages the flow of the liquid is slow and in consequence the body will gradually descend until piston 40 is again at the end of its stroke. In case valve 36 should stick to its seat or otherwise become inoperative, the fixed nozzle 30 in consequence of its form still opposes a resistance to the returning liquid which prevents the box from descending suddenly.

As mentioned, the dumping levers 45 are so arranged on shaft 46 as to be exactly or approximately equi-distant from the longitudinal center of the pin 52 with which they cooperate, see Figs. 5 and 6. The brackets 47 supporting said pins by sleeve 53 extend into recesses 47 of the dumping) shaft 46 which shaft, as illustrated, may e hollow. The dumping levers 45 are constructed as webs to make up for the loss of material and consequent weakening of the shaft due to the recesses 47. The pins 52 are fixed in the brackets 47 and shaft 46 is supported on them by means of bushes 54 and 55 which rock on the fixed pins 52.

The dumping body 50 is braced in itself so as to require no special supporting means. This not only simplifies its construction but also saves weight. When in its normal position, the body rests on supports 56 secured to the under frame 48.

We claim:

1. In a dumping wagon, a dumping body adapted to pivot about a shaft supported on the underframe of the wagon, fixed pins on which said shaft is carried, said pins being coaxial with and arranged within recesses provided in said shaft, a dumping cylinder cotiperating with said dumping shaft, means for supplying liquid under pressure to said dumping cylinder, means for maintaining the tipped body in position and means for retarding its descent.

2. In a dumpin wagon, a dumping body adapted to pivot a out a shaft supported on the-underframe of the wagon, fixed pins on which said shaft is carried, said pins being coaxial with and arranged within recesses provided in said shaft, levers on said shaft, pins secured in said levers, and means for actuating said levers engaging said pins in ing Said pins in said levers, means for maintaining the tipped body in position and means for retarding its descent.

4. In a dumping wagon, a dumping body adapted to pivot about a shaft supported on the underframe of the wagon, fixed pins on which said shaft is carried, said pins being" coaxial with and arran ed within recesses provided in said shaft, earings formed in said shaft on each side of said recesses, said bearings being supported on said fixed pins, means for rocking said shaft on said pins, means for maintaining the tipped body in position and means for retarding its descent.

'5. In a dumping wagon, a pivoted dumping body, means for tipping said body, a pump for supplying liquid under pressure to said tipping cylinder, a driving shaft, means for connecting said pump with said driving shaft, a by-pass connecting the suction and pressure chambers of said pump, a valve in said by-pass, means for controlling said valve, means for maintaining the tipped body in position and means for retarding its descent.

6. In a dumping wagon, a pivoted dumping body, means for tipping said body, a pump for supplying liquid under pressure to said tipplng means, a driving shaft, means for connecting said pump with said driving shaft, a by-pass connecting the suction and pressure chambers of said pump, a valve in said by-pass, means for controlling said valve, said means being operatively I connected with said means for connecting said pump with said driving shaft, means for maintaining the tipped body in position and means for retarding its descent.

7. In adumping wagon, a pivoted dumping body, means for tipping said body, a pump for supplying liquid under pressure to said tipplng means, a driving shaft, means for connecting said pump with said driving shaft, a by-pass connectmg the suction and pressure chambers of said pump, a

valve in said by-pass, means for controlling said valve, said means being operatively connected with said means for connecting said pump with said driving shaft, pipes connecting said pump with said means for tipping said body and a liquid reservoir, respectively, means for maintaining the tipped body in position and means for retarding its descent.

.ing

8. In a dumping wagon, a pivoted dumpbody, a dumping cylinder cooperating with said body, uid under pressure to said cylinder, at driving shaft, means for connectin said pump with said driving shaft, a yielding member inserted in said means, a by-p'ass connecting the suction and pressure chambers of said pump, a valve in said by-pass, means for controlling said valve, said means being operatively connected with said means for pressure chambers of said a pump" for supplying liqconnecting said pump with said driving shaft, means for maintainin the tipped body in position and means or retarding its descent.

9. In a dumping wagon, a pivoted dump- .ing body, means for tipping said body, a

communication between said means for t1pping said body and said liquid reservoir,

means for maintaining the tipped body in position and means for retarding its descent.

10. In a dumping wagon, a pivoted dumping body, means for tipping said body, a pump for supplying liquid under pressure to said tipping means, a driving shaft, means for connecting said pump with said driving shaft, a by-pass connecting the suction and pressure chambers of said pump, a valve in said by-pass, means for controlling said valve, said means being operatively connected with said means for connecting said pump with said driving shaft, pipes connecting said pump with said means for tipping said body and a liquid reservoir, respectively, a pipe connecting said means for tipping said body with said liquid reser voir, and means for effecting a communica tion between said means for tipping said body and said liquid reservoir, a tapered nozzle inserted in said pipe connecting said pump with said means for tipping said body, the tapered end of said nozzle being directed toward said rocking means, and

means for maintaining the tipped body in position.

11 In a dumping wagon,

a pivoted dumping body, means for tipping said body,a

pump for supplying liquid under pressure to said tipping means, a driving shaft, means for connecting said pump with said driving shaft, a by-pass connecting the suctionand pump, a valve in said by-pass, means for controlling said valve, said means being operatively. con-.

nected with said means for connectingsaid pump with said driving shaft,

pipes connecting said pump with saidmeans for tipping said'body and a liquid reservoir, re-

spectively, a pipe connecting said means for tipping said body with said liquid reservoir, and means for effecting a communication between said means for tipping said body and said liquid reservoir, a check valve inserted in said pipe connecting said pump with said means for tipping said body, said check valve having a longitudinal perforation connecting the front and rear faces of said valve, means for maintaining the tipped body in position and means for retarding its descent.

12. In a dumping Wagon, a pivoted dumping body, means for tipping said body, a pump for supplying liquid under. pressure to said tipping means, a driving shaft, means for connecting said pump' with said driving shaft, a b y-pass connecting the suction and pressure chambers of said pump, a valve in said by-pass, means for controlling said valve, said means being operatively connected with said means for connecting said pump with said driving shaft, pipes connecting said pump with said means for tipping said body, and a liquid reservoir,

respectively, a pipe connecting said means for tipping said body with said liquid reservoir, and means for effecting a communication between said means for tipping said body and said liquid reservoir, a tapered nozzle inserted in said pipe connecting said pump with said means for tipping said body, the tapered end of said nozzle being directed toward said tipping means, a check valve inserted in said pipe connectingsaid pump with said means for tipping said body, said check valve having a longitudinal perforation, connecting the front and rear faces of said valve, and means for main taining the tipped body in position.

13. In a dumping-wagon, a wagon frame,

. a pivoted dumping body, a cylinder, a piston operatively connected to the body, a pump connected to the cylinder by delivery and return pipes and provided with a bypass, a valve' to control the by-pass, clutchcontrolled means to operate the pump, and a single operating means to operate said valve and said clutch.

14. In a dumping-wagon, a wagon frame, a pivoted dumping body, a cylinder, a piston operatively connected to the body, a pump connected to the cylinder by delivery and return pipes and provided with a bypass, a valve to control the by-pass, clutchcontrolled means to operate the pump, a

yielding connection being interposed between said operating means and the clutch whereby the first movement of the operat ing means closes the clutch and the continued movement thereof closes the valve.

15. In a dumping-wagon, a wagon frame, a pivoted dumping body, a cylinder, a piston operatively connected to the body, a pump connected to the cylinder by delivery and return pipes and provided with a bypass, a valve to control the by-pass, clutchcontrolled means to operate the pump, a

I single operating shaft, an arm on said shaft in operative relation with the stem of the valve, a clutch lever, and a second arm on said shaft operatively connected to said clutch lever.

16. In a dumping-Wagon, a Wagon frame, a pivoted dumping body, a cylinder, a piston operatively connected to the body, a pump connected to the cylinder by delivery and return pipes and provided with a bypass, a valve to control the by-pass, clutchcontrolled means to operate the pump, a single operating shaft, an arm on said shaft in operative relation with the stem of the valve, a clutch lever, and a second arm on said shaft operatively connected to said clutch lever, a yielding member being interposed in the connection between said second arm and said clutch lever, whereby the movement of the operating shaft, after the clutch has been closed, may be continued to close the valve in the by-pass.

17 In a dumping wagon, a wagon frame, a pivoted dumping body, an actuating pump, a cylinder in communication with the pump, a piston operatively connected to the wagon body, and a check valve interposed in the connection between the pump and the cylinder, said check valve being perforated so as to permit a restricted return flow, whereby the descent of the wagon body is retarded.

In testimony whereof, we have signed this specification.

HEINRICH MAYER. GUSTAV SCI-ILATTER.

Witnesses FRANK DIMMKE, EMIL MEILE. 

